Question

-INVERSE OPERATION "undo" each other!
Inverse of addition? ___________
Inverse of subtraction? ___________
Inverse of multiplication? ___________
Inverse of division? ___________

Answer 1

inverse of addition? subtraction.
inverse of subtraction? addition.
inverse of multiplication? division. 
inverse of division? multiplication.

hope this helps (;

Answer 2

addition- subtraction
subtraction-addition
multiplication-division
division-multiplication

Hope this helps! (: